涂布机烘箱温度场特性分析与结构优化

Analysis of Temperature Field Characteristics and Structural Optimization of Coating Machine Oven

关键词:  涂布机烘箱  仿真分析  温度场特性分析  结构优化

Key Words:coating machine oven  analogue simulation  analysis of temperature field characteristics  structural optimization

摘要:本研究利用三维建模和流体仿真软件对涂布机烘箱流场进行仿真，发现烘箱流场存在长度方向上温度不均匀且各风嘴处温度方差较大的问题。针对以上问题，从导流板圆角半径、烘箱进风口位置及导流板数量方面入手，对烘箱结构进行优化并设计多组对比仿真实验。结果表明，增大导流板圆角半径会使导流板背面紧邻两处风嘴的温度有所提升，烘箱进风口位置的改变对基材表面温度分布有明显提升，增加导流板数量并合理设置其结构尺寸及空间位置使得热风在烘箱风室中部位置滞留，可以降低基材表面温度的不均匀性。并依据以上结论对烘箱模型进一步优化，将各风嘴处平均温度差由±4.5 ℃降低至±2.5 ℃，为后续烘箱设计及优化提供借鉴和理论依据。

Abstract:3D modeling and fluid simulation software were used to simulate the flow field of the coating machine oven，and discovered that the temperature of the drying oven flow field was uneven in the length direction and the temperature variance at each nozzle was large. Aiming at the above problems， the structure of the oven was optimized from the angle radius of the deflectors， the position of the air inlet， and the number of the deflectors. Multiple sets of comparative simulation experiments were designed. The result showed that increasing the corner radius of the deflectors would increase the temperature of the two air noses close to the back of the deflectors， and the change of the position of the air inlet of the oven would significantly increase the temperature distribution on the surface of the substrate. Increasing the number of deflectors and rationally setting its structure size and space position could reduce the temperature distribution of the substrate surface by making the hot air stay in the middle of the air chamber of the oven. According to the above conclusions， the oven model was further optimized to reduce the average temperature difference at each air nozzle from ±4.5 ℃ to ±2.5 ℃， which could provide reference and theoretical basis for subsequent oven design or optimization.